KR102487607B1 - Direct current cut-off device(PCR) inspection kit and its operation method - Google Patents

Abstract

The present invention relates to a DC current breaker. The present invention provides a temporary power generation unit that generates power to generate a potential difference at both ends, a power selection unit that selects and provides power to apply power that meets the specifications of the DC current breaker, and when inspecting the DC current breaker A measuring terminal connected to both ends of the DC current breaker to measure the current, and a circuit protection unit composed of a fuse disposed between the power selection unit and the measuring terminal to prevent overcurrent from occurring when the DC current breaker operates. . According to the present invention, when an abnormal current flows in, it is possible to prevent a worker from electric shock and equipment damage due to an abnormal current inflow by checking whether the DC current breaker operates normally under the corresponding conditions and discharges the abnormal current to the ground.

Description

Direct current cut-off device (PCR) inspection kit and its operation method}

The present invention relates to a DC current breaker inspection kit and an operation method thereof, and more particularly, to a DC current breaker inspection kit capable of checking whether abnormal current is normally discharged to ground when an abnormal current is introduced.

Currently, it is common to manage natural gas pipelines buried underground in pipelines and management centers using an external power supply method to prevent corrosion caused by electrical interference. In order to operate this efficiently, various types of anticorrosive facilities are in operation, and to prevent the leakage of anticorrosive current to non-corrosive objects and grounding facilities, insulation facilities (IJ) and DC current cut-off devices (PCR) are installed in the management office. there is.

Inspection of the DC current breaker (PCR) is performed by measuring the potential difference and leakage current at both ends of the voltmeter (Multi-Tester) and leakage current meter (Clamp-Meter). However, the function of the DC current breaker (PCR) is to have a function to discharge to the opposite side and a grounding facility in case of abnormal current along with the blocking function, so it is necessary to check the two functions. However, at present, only the blocking function is checked by measuring the potential difference, and the discharge function is not checked when an abnormal current occurs. The operating condition of the DC current breaker is that the potential difference between the two ends of DC is -3V, -6V, -12V or less ~ +1V, +6V, or +12V or more, and AC must be discharged at all times when it occurs, but such automatic conditions are artificially implemented in the field. There is a problem that is difficult to do.

The problem to be solved by the present invention is to provide a DC current breaker inspection kit and its operation method that can check whether abnormal current is normally discharged to the ground when an abnormal current flows into the DC current breaker, thereby securing the soundness of a gas pipe buried in the ground, It is possible to prevent workers from electric shock accidents and equipment damage caused by abnormal current inflow.

In the DC current breaker inspection kit according to an embodiment of the present invention, a temporary power generation unit that generates power to generate a potential difference between both ends of the DC current breaker and selects power to apply power that meets the specifications of the DC current breaker. A power selector that provides power by checking the DC current breaker, a measurement terminal that is connected to both ends of the DC current breaker to measure current, and is disposed between the power selector and the measurement terminal, but when the DC current breaker operates In order to prevent overcurrent from occurring, a circuit protection unit composed of a fuse is provided.

According to the present invention, when an abnormal current flows in, it is possible to prevent a worker from electric shock and equipment damage due to an abnormal current inflow by checking whether the DC current breaker operates normally under the corresponding conditions and discharges the abnormal current to the ground.

In addition, there is an effect of ensuring the soundness of the gas pipe buried in the ground by maintaining the corrosion protection current of the gas pipe buried in the ground at an appropriate level at all times.

1 is a circuit diagram of a DC current breaker inspection kit according to an embodiment of the present invention.
2 is a flowchart illustrating an operating method of a DC current breaker inspection kit according to an embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are only illustrated for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be embodied in many forms and are not limited to the embodiments described herein.

Embodiments according to the concept of the present invention can apply various changes and can have various forms, so the embodiments are illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all modifications, equivalents or substitutes included in the spirit and scope of the present invention.

Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in this specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram of a DC current breaker inspection kit according to an embodiment of the present invention.

Referring to FIG. 1, the DC current breaker inspection kit 10 includes a temporary power generation unit 110, a power selection unit 120, a circuit protection unit 130, a measurement terminal unit 140, and an operating status display unit 150. consists of

The temporary power generation unit 110 generates power to generate a potential difference between both ends of the DC current cut-off device. The temporary power generator 110 connects DC 9V x 2 in series to meet DC ±12V, which is the maximum operating voltage of the DC current breaker, and supplies DC ±18V to the DC current breaker.

The temporary power generator 110 generates power by dividing the operating voltage into DC ±3V (for grounding/GR) and ±6V/±12V (for insulating facility protection/IJP), and receives DC ±18V supplied primarily. A DC voltage regulator is used to create a potential difference suitable for the operating conditions of the DC current breaker.

The power selector 120 selects and provides power so as to apply power that meets the specifications of the DC current cut-off device. The power selection unit 120 is disposed between the temporary power generation unit and the circuit protection unit. The power selector 120 is composed of two constant voltage ICs and a plurality of capacitors, resistors, and diodes.

The circuit protection unit 130 is disposed between the power selection unit and the measurement terminal unit, and is composed of a fuse to prevent overcurrent from occurring when the DC current cut-off device is operated. In the circuit protection unit 130, the current generated by the DC current breaker is weak, but the current flowing into the inspection kit from the gas pipe and equipment when the DC current breaker is operated is greater than this, so the inspection kit may be damaged, such as resistors, fuses, etc. The circuit is protected from overcurrent by using the element of

The measurement terminal unit 140 is connected to both ends of the DC current cut-off device during inspection to measure the current. Temporary power must be applied to both ends of the connection terminals to create operating conditions for the DC current cut-off device (PCR). That is, the measurement terminal unit 140 is a lead wire for electrically connecting the DC current cut-off device and the inspection kit, and the end is manufactured in the shape of a pair of tongs so that one person can easily inspect it and prevent an electric shock accident.

The operating state display unit 150 is provided with an LED light emitting element to display the operating state of the DC current cut-off device. In the operating state display unit 150, when the DC current cut-off device becomes an operating condition due to the inflow of abnormal current, the DC current cut-off device is operated and the abnormal current is discharged to the ground through the DC current cut-off device, so that the proper method potential of the gas pipe is maintained. At this time, when the DC current cut-off device is operated, its state can be displayed with a lamp (LED), a buzzer, an ammeter, and the like.

2 is a flowchart illustrating an operating method of a DC current breaker inspection kit according to an embodiment of the present invention.

Referring to FIG. 2, the operating method of the DC current breaker inspection kit first detects a current (S101), checks whether the DC current breaker operates under the condition when an abnormal current flows in, and checks whether the abnormal current is discharged to the ground. Check (S105). The corresponding condition is less than -3V, -6V, -12V ~ +1V, +6V, +12V or more of the potential difference between the ends of DC.

Conventionally, only the current blocking (insulation) was checked by measuring the potential difference between both ends of the DC current breaker (PCR) with a voltmeter (multi-tester), but the DC current breaker inspection kit according to the present invention The current cut-off device (PCR) operates normally and checks whether abnormal current is discharged to the ground, so that the corrosion protection current for corrosion prevention of the gas pipe buried in the ground is always properly maintained, ensuring the integrity of the gas pipe buried in the ground. In addition, it is possible to prevent electric shock accidents and equipment damage caused by abnormal current inflow.

It has been described with reference to the embodiment shown in the drawings of the invention, but this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached claims.

10; DC current breaker inspection kit 110; Temporary power generator
120; power selector 130; circuit protection part
140; Measuring terminal unit 150; Operating status display

Claims (2)

In the DC current breaker inspection kit,
a temporary power generation unit for generating power to generate a potential difference between both ends of the DC current breaker;
a power selection unit that selects and provides power to apply power that meets the specifications of the DC current breaker; and
A measuring terminal connected to both ends of the DC current breaker when checking the DC current breaker to measure current; and
a circuit protection unit disposed between the power selection unit and the measurement terminal unit and composed of a fuse to prevent overcurrent from occurring when the DC current cut-off device is operated;
Equipped with an LED light emitting element and an operating state display unit for displaying to check the operating state of the DC current breaker,
The temporary power generator,
The operating voltage is divided into DC ±3V (for grounding/GR) and ±6V/±12V (for insulation facility protection/IJP) to generate power, receive DC ±18V supplied primarily, and use a DC voltage regulator to generate DC current. Create a potential difference suitable for the operating conditions of the cut-off device,
Although the current generated by the DC current breaker is weak in the circuit protection unit, the current flowing into the inspection kit from the gas pipe and equipment when the DC current breaker is operated is greater than this, so there is a risk of damage to the inspection kit, so elements such as resistors and fuses to protect the circuit from overcurrent by using
The operating state display unit operates when the DC current breaker is in an operating condition due to the inflow of abnormal current, the abnormal current is discharged to the ground through the DC current breaker, and the proper method potential of the gas pipe is maintained, and the DC current breaker is discharged to the ground. A DC current breaker inspection kit that displays the status with a lamp (LED), buzzer, and ammeter when the device is operating.



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